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I got some great advice last year and I bought a bunch of zaino stuff to wash, clay and wax my car. There are however water spots all over the hood and the roof - some subtle and visible at an angle while some visible in light.

The huge bird poop stain went away using Meguiars Scratch X 2.0 but is there any product that would stop it form happening - do I need a better wax or more layers of it.

Claying has not helped to remove the water spots - what do I need to correct the paint. I read about porter cable and orange and other color pads but not sure what to buy. Can you guys point me what exactly should I buy that can help me correct the paint? Thanks.

For hard water spots on paint, I started using CHEMICAL GUYS: Water spot remover. But dilute it, if i am not mistaken 4:1. IT is an acidic in base.
For windows, you can use the above, but don't need to dilute it.